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I have a 1420 with standard rotor. Green stem soybeans have really been a problem the last couple years. I have a 15' 820 header and can only combine at 2 to 2.5 mph. Is there anything that I can change or modify to speed up a little. I have large wire concaves and keystock grates. I have heard about others taking out straight rasp bars. Any help would be greatly appreciated.
 

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In tough soybeans you want to run with the vanes over the rotor in full advance position. These can be adjusted with the rotor in but you need long arms to do it.

At one time a product called "disruptors" (at least I think they were called that) were used to cut up the stems, these are mounted to the keystock grates, and I don't know if they're available anymore.

You can also run the rotor at a higher RPM than the book calls for...I'd run it up until the beans were spliting and then slow it down.
 

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If this combine has not had the fuel turned up, turn it up. Some of the 1420's came out very weak. A friend gained 2 mph. Or turbo it, I did mine and in excelent conditions (40 bu beans, dead dry, frozen ground) I could push a 20 ft 820 at 5 mph. TORQUE
 

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Check the grates. On mine there was two sets of holes for the mount bracket to bolt into. In beans I would raise them up (closer to the rotor) and in corn I would drop them ( move them away from the rotor). I also ran the tooth bars on the rear section of the rotor. This helped a lot. Also bumped up the fuel pressure on the little girl. Then I had something.

runt
 

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I would go with a specialty rotor if possible. That will make a huge difference. The standard rotor just doesn't handle tough conditions well at all. We were constantly rumbling and plugging with our standard rotor in damp edible beans and we were just barely crawling along.
 

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we had a 1983 1420 years ago with a 15 ft 820 . we were never happy with it. then we traded for a 20ft 1020. believe it or not the combine handled it better than the 15ft 820. the 15ft 820 over loaded the combine the 1020 didnt. the reason , the 1020 fed the crop in more even.what year is your combine? the newer 1420s had 120 or 125 hp and the earlier 112hp.talk to your dealer if he has been a salesmen back in the day of the 820 he will tell the 1020s work way better
 
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